iPhone 12 - Green Screen

[raaaaach]

Hi everyone, thought this might be the best place to post. I got my iPhone 12 on a two-year contract last November - so I believe it's still under warranty. 

I was using my phone last night and the screen start flashing white randomly. I woke up this morning and my phone screen is green/white/stripy and more or less unusable. I've hard reset my phone and completely wiped it, yet this hasn't fixed the issue. It's not the result of water damage/accidental damage so I am stumped.

Ideally, I want to have it repaired but don't want to pay any extortionate prices. Any help would be really appreciated! Would I be able to take it into a local o2 store to have it looked at - or would I have to go to Apple? 

Thanks so much in advance!

[Bambino · Accepted solution]

@raaaaach You could send it to O2 for repair, or you could take it to an Apple store. I haven't a clue as to what the repair would cost, but it may cost nothing if the phone is still under warranty.